import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css'// progress bar style
import { getToken } from '@/utils/auth' // getToken from cookie
import Layout from '@/views/layout/Layout'
import axios from 'axios'
const _import = require('./router/import')// 获取组件的方法

NProgress.configure({ showSpinner: false })// NProgress Configuration

let getRouter

function hasPermission(roles, permissionRoles) {
  if (roles.indexOf('admin') >= 0) return true // admin permission passed directly
  if (!permissionRoles) return true
  return roles.some(role => permissionRoles.indexOf(role) >= 0)
}

function routerGo(to, next) {
  getRouter = filterAsyncRouter(getRouter)
  store.dispatch('NewGenerateRoutes', { getRouter }).then(() => { // 根据roles权限生成可访问的路由表
    router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
    next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
  })
}

function saveObjArr(name, data) { // localStorage 存储数组对象的方法
  localStorage.setItem(name, JSON.stringify(data))
}

function getObjArr(name) { // localStorage 获取数组对象的方法
  return JSON.parse(window.localStorage.getItem(name))
}

function filterAsyncRouter(asyncRouterMap) { // 遍历后台传来的路由字符串，转换为组件对象
  const accessedRouters = asyncRouterMap.filter(route => {
    if (route.component) {
      if (route.component === 'Layout') { // Layout组件特殊处理
        route.component = Layout
      } else {
        route.component = _import(route.component)
      }
    }
    if (route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children)
    }
    return true
  })
  return accessedRouters
}

const whiteList = ['/login', '/auth-redirect']// no redirect whitelist

router.beforeEach((to, from, next) => {
  NProgress.start()
  if (getToken()) {
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else {
      if (!getRouter) { // 不加这个判断，路由会陷入死循环
        if (!getObjArr('router')) {
          // axios.get('').then(res => {
          //   getRouter = res.data.data.router// 后台拿到路由
          //   saveObjArr('router', getRouter) // 存储路由到localStorage
          //   routerGo(to, next)// 执行路由跳转方法
          // })

          next(`/login`) // 否则全部重定向到登录页
          NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
        } else { // 从localStorage拿到了路由
          getRouter = getObjArr('router')// 拿到路由
          console.log(to)
          routerGo(to, next)
        }
      } else {
        next()
      }
    }
  } else {
    if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
      next()
    } else {
      next(`/login?redirect=${to.path}`) // 否则全部重定向到登录页
      NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
})

// router.beforeEach((to, from, next) => {
//   NProgress.start() // start progress bar
//   if (getToken()) { // determine if there has token
//     /* has token*/
//     if (to.path === '/login') {
//       next({ path: '/' })
//       NProgress.done() // if current page is dashboard will not trigger	afterEach hook, so manually handle it
//     } else {
//       if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
//         store.dispatch('GetUserInfo').then(res => { // 拉取user_info
//           const roles = res.data.roles // note: roles must be a array! such as: ['editor','develop']
//           store.dispatch('GenerateRoutes', { roles }).then(() => { // 根据roles权限生成可访问的路由表
//             router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
//             next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
//           })
//         }).catch((err) => {
//           store.dispatch('FedLogOut').then(() => {
//             Message.error(err || 'Verification failed, please login again')
//             next({ path: '/' })
//           })
//         })
//       } else {
//         // 没有动态改变权限的需求可直接next() 删除下方权限判断 ↓
//         if (hasPermission(store.getters.roles, to.meta.roles)) {
//           next()
//         } else {
//           next({ path: '/401', replace: true, query: { noGoBack: true }})
//         }
//         // 可删 ↑
//       }
//     }
//   } else {
//     /* has no token*/
//     if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
//       next()
//     } else {
//       next(`/login?redirect=${to.path}`) // 否则全部重定向到登录页
//       NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
//     }
//   }
// })

router.afterEach(() => {
  NProgress.done() // finish progress bar
})
